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Usage: Overview

Table 1: User statistics
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
302,640 276,133 24% 42% 23% 11% 35,358 94% 3% 2% 1%
- Simulation Users 5
11,360 4,478 47% 27% 16% 10% 4,715 91% 4% 1% 3%
- Interactive Users 6
67,137 61,276 30% 41% 19% 10% 10,692 96% 2% 1% 0%
- Download Users 7
258,457 253,071 25% 41% 23% 11% 28,332 95% 3% 2% 0%
Total Users (old defn) 8
78,545 - - - - - - - - - -
Table 2: Simulation Usage
Simulation Users 5 11,360 users
Simulation Runs 682,531 jobs
Total CPU Time 16,262 days  
Total Wall Time 45,084 days  
Total Interaction Time 8,340 days  
Users with > 10 mins of CPU Time 4,210 users  
Avg. Number of Simulation Runs/User 60 jobs  
Avg. Time between First and Last Simulation 5,975 days  
Repeat Users with > 10 Simulation Jobs 5,690 users  
Repeat Users with > 3 Months 9 3,127 users  
Table 3: Miscellaneous Statistics
Domains Served 19,306
Cummulative Interactive User Sessions 10 284,379
Cummulative Session Time 13,085 days
Visitors 11 656,229
Visits 12 2,324,722
New Accounts 12,573
Max User Logins 1000 users on 2014-02-19
Web Server Hits 99,472,873
Table 4: Collaboration Usage
Shared Tool Sessions 13 165
New tools under development 53
Table 5: User statistics by registered/unregistered
Users Totals Residence Organization
Identified US Asia Europe Other Identified Edu. Ind. Gov. Other
Total Users 1
302,640 276,133 24% 42% 23% 11% 35,358 94% 3% 2% 1%
- Registered Users 2
26,797 6,711 47% 28% 16% 9% 7,064 89% 6% 1% 4%
- Unregistered Interactive Users 3
41,192 38,735 23% 47% 21% 9% 4,337 95% 3% 2% 0%
- Unregistered Download Users 4
234,651 230,687 24% 42% 23% 11% 23,957 95% 3% 2% 0%

  1. Sum of Registered Users2, Unregistered Interactive Users3 and Unregistered Download Users4
  2. Number of Users that logged in. User registration assigns a unique login to each individual user.
  3. Number of Unregistered Users, identified by unique hosts/IPs, that had an active Session 10 without logging in. Does not include known web bots/crawlers.
  4. Number of Unregistered users, identified by unique hosts/IPs, that had an active session of less than 15 minutes without logging in and downloaded a non-interactive resource such as PDF or podcast. Does not include web bots/crawlers.
  5. Number of Registered Users2 that ran one or more simulation runs.
  6. All Unregistered Users, identified by unique hosts/IPs, that had an active Session 10. Does not include known web bots/crawlers.
  7. All Unregistered users, identified by unique hosts/IPs that downloaded a non-interactive resource such as PDF or podcast. Does not include known web bots/crawlers.
  8. Sum of Simulation Users 5 + Unregistered Interactive Users 3 including web bots/crawlers.
  9. Number of Simulation users that returned after a gap of 3 months.
  10. Begins when an IP is active on the site for at least 15 minutes. Ends when inactive for more than 30 minutes, including time spent viewing videos.
  11. Identified by a unique IP address / hostname.
  12. Based on MIT OCW metric of Visits: A visit is activity by a unique visitor delimitated by a 30 minute absence from the site on either side of the activity.
    These visits correspond to unique visitors 11. Does not include known web bots/crawlers
  13. Number of Simulation sessions that were shared between 2 or more users.

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